nothing after boot screen

I installed a trojan remover softwarewhich after cleaning asked me to reboot.When i rebooted it after the boot screen no display is coming and it is not even entering in the safe mode....pls some body help with this

Print article for reference, and make sure to do the Repair Install because some people get another XP installed.http://support.microsoft.com/defaul...How to Perform an In-Place Upgrade (Reinstallation) of Windows XP

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